In RuneScape 3, this diary is known as the Seers' Village Diary which gave the reward of a Seer's headband. This pays homage to the first diary reward which is a leather headband that transformed into a helm.

Another detail about the original Seers' Village diary, (Kandarin diary) was that the hard and elite tasks had a special reward to enhance Excalibur for players. This upgraded sword also has a special attack which is used to heal 4% of the player's maximum Hitpoints 10 times (with Elite tasks complete, 5 if not) over 40 seconds.

There were a few hints from the Old School RuneScape team about the enhanced excalibur before the diary update, but it wasn't added due to it devaluing the Saradomin Godsword and Guthans set. [1]